一本免费的在线书籍，供你在非常需要了解如何处理贝塞尔相关的事情。
https://pomax.github.io/bezierinfo/zh-CN/index.html
An algorithm to find bounding box of closed bezier curves? - Stack Overflow
https://stackoverflow.com/questions/2587751/an-algorithm-to-find-bounding-box-of-closed-bezier-curves
前端动画之贝塞尔曲线推导及应用-CSDN博客
https://blog.csdn.net/frontend_frank/article/details/123437040
